HOHHOT, Jan. 18 (Xinhua) -- Multiple injured people have been rescued after an explosion at a factory in western Baotou City, north China's Inner Mongolia Autonomous Region, according to local authorities.

The city's emergency management bureau said the blast occurred at a plate plant of Baogang United Steel at around 3 p.m. on Sunday, but the number of casualties remains unclear.

The blast caused noticeable tremors in its surrounding areas. Rescue operations are currently underway.